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目的：明确ＭＲＩ在诊断松果体先天性囊肿中的作用。材料和方法：对１３例松果体先天性囊肿病人进行ＭＲ检查，其中７例做增强扫描。结果：１３例囊肿均位于松果体区，呈圆形或椭圆形，边界光滑锐利。病灶最大直径２．２ｃｍ，最小０．６ｃｍ。Ｔ１加权像上呈低信号，Ｔ２加权像表现为高信号，与脑脊液信号相仿。７例增强检查者，病灶本身均无强化，其中２例包膜强化。２例ＣＴ扫描呈类圆形低密度区，ＣＴ值为１２－１６Ｈｕ，囊壁呈线状稍高密度，边界清楚。结论：ＭＲＩ对本病的诊断有重要作用，可直接形成三种位置图像，进而完好地显示该病灶的大小、形态、部位及性质，为松果体先天性囊肿的临床诊断与治疗提供了有力的依据
Objective: To clarify the role of MRI in the diagnosis of pineal congenital cysts. Materials and Methods: 13 cases of pineal congenital cysts were examined by MR, and 7 of them were used for enhanced scanning. Results: All the 13 cysts were located in the pineal region and were round or oval with smooth and sharp borders. The maximum lesion diameter 2.2cm, the smallest 0.6cm. The T1 weighted image showed a low signal and the T2 weighted image showed a high signal, similar to the cerebrospinal fluid signal. In 7 cases of enhanced examination, no enhancement of the lesion itself, of which 2 cases were enveloped. The CT scans in 2 cases were round-like low-density areas with a CT value of 12-16 Hu. The wall of the CT scan was slightly linear and the border was clear. Conclusion: MRI plays an important role in the diagnosis of this disease. It can directly form three kinds of location images, and then the size, shape, location, and nature of the lesion can be perfectly displayed, providing powerful clinical diagnosis and treatment for congenital cysts of the pineal gland. The basis